Extra 25% off top-secret theatre tickets from £4, including West End shows...

Welcome to the hush-hush world of last-minute seat-filling, where it's possible to watch a theatre show for around £4 to £6.50 – and what's more, we've a way for newbies to get an extra 25% off on top. Theatres do it because they quite literally need bums on seats to help create an atmosphere – but you must agree not to say what you get so you don't upset people who pay full whack.